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Updated weekly · Last refresh Aug 30

ExxonMobil Data Scientist Interview Questions

The questions to prepare for a ExxonMobil Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

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1
Machine LearningStart here. 7 questions · ~57 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffExxonMobil
Regression vs Classification BasicsEasy

Explain how regression and classification differ, including target type, outputs, and how you evaluate each.

Feature EngineeringSupervised LearningExxonMobil
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2
Statistics & Probability6 questions · ~49 min
A/B Testing for Product FeaturesMedium

Explain how to design and evaluate an A/B test for a product feature, including metrics, MDE, sample size, and guardrails.

Hypothesis TestingStatistical SignificanceA/B TestingExxonMobil
Finding Patterns in Energy UseMedium

Tests exploratory analysis and time-series or cohort thinking for energy consumption data.

RegressionCorrelationTime SeriesExxonMobil
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3
More topics6 questions · ~49 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityExxonMobil
Choosing Classification Evaluation MetricsEasy

Explain which classification metrics to use and how metric choice depends on the business objective and error tradeoffs.

PrecisionAccuracyRecallExxonMobil
Using Pandas and NumPyEasy

Tests proficiency with data wrangling and numerical computation for analysis workflows.

Data WranglingGroup ByAggregationsExxonMobil
Supply Chain Optimization DataMedium

Tests ability to identify relevant datasets and connect them to operational levers.

ETLData ModelingQualityExxonMobil
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 19 questions plus 3 hands-on drills to finish this plan.